Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
10
health-based violations
14
violations on file
0
still open
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Resolved | 2010-04-01 → 2010-06-30 |
| MCL | Health-based | Resolved | 2005-04-01 → 2005-06-30 |
| MCL | Health-based | Resolved | 2005-04-01 → 2005-06-30 |
| MCL | Health-based | Resolved | 2005-04-01 → 2005-06-30 |
| MCL | Health-based | Resolved | 2005-04-01 → 2005-06-30 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-03-31 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-03-31 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-03-31 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-03-31 |
| MCL | Health-based | Resolved | 2005-01-01 → 2005-03-31 |
PFAS detected
PFAS are industrial “forever chemicals”. These are the EPA's latest
nationwide test results (2023–2025).
Other contaminants detected
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of this
system's samples — over 100% is worth reading, but is not by itself a
violation. Where a single sample came in higher than that percentile, it
is noted under the bar. Formal violations are listed separately.
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Bromodichloromethane | 8.054 µg/L No EPA limit set
worst single sample: 9.9 µg/L | 65/65 | SYR4 | 2012–2019 |
| Copper | 613.2 µg/L 47% of the EPA limit 1300 µg/L
worst single sample: 718 µg/L | 65/65 | SYR4 | 2013–2017 |
| Chloroform | 31.54 µg/L No EPA limit set
worst single sample: 37.7 µg/L | 65/65 | SYR4 | 2012–2019 |
| Dichloroacetic Acid | 32.52 µg/L No EPA limit set
worst single sample: 36.7 µg/L | 57/57 | SYR4 | 2012–2019 |
| TTHM | 38.68 µg/L 48% of the EPA limit 80 µg/L
worst single sample: 41.9 µg/L | 57/57 | SYR4 | 2012–2019 |
| Total Haloacetic Acids (HAA5) | 46.08 µg/L 77% of the EPA limit 60 µg/L
worst single sample: 49.4 µg/L | 57/57 | SYR4 | 2012–2019 |
| Trichloroacetic Acid | 12 µg/L No EPA limit set
worst single sample: 14.4 µg/L | 57/57 | SYR4 | 2012–2019 |
| Lead | 6.23 µg/L 42% of the EPA limit 15 µg/L
worst single sample: 30.7 µg/L | 41/65 | SYR4 | 2013–2017 |
| Monochloroacetic Acid | 4.35 µg/L No EPA limit set
worst single sample: 4.7 µg/L | 26/57 | SYR4 | 2012–2019 |
| Nitrate | 566 µg/L 5.7% of the EPA limit 10000 µg/L | 18/18 | SYR4 | 2012–2019 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L | 16/16 | LCR | 2025 |
| Dibromochloromethane | 2.158 µg/L No EPA limit set
worst single sample: 2.5 µg/L | 13/65 | SYR4 | 2012–2019 |
| Dibromoacetic Acid | 5.965 µg/L No EPA limit set
worst single sample: 6 µg/L | 8/57 | SYR4 | 2012–2019 |
| Fluoride | 222.6 µg/L 5.6% of the EPA limit 4000 µg/L
worst single sample: 224 µg/L | 8/8 | SYR4 | 2012–2019 |
| Barium | 80.8 µg/L 4% of the EPA limit 2000 µg/L
worst single sample: 82 µg/L | 7/7 | SYR4 | 2013–2019 |
| Atrazine | 0.3250 µg/L 11% of the EPA limit 3 µg/L
worst single sample: 0.3300 µg/L | 6/11 | SYR4 | 2012–2019 |
| Arsenic | 1.28 µg/L 13% of the EPA limit 10 µg/L
worst single sample: 1.3 µg/L | 5/7 | SYR4 | 2013–2019 |
| Cyanide | 148.12 µg/L 74% of the EPA limit 200 µg/L
worst single sample: 160 µg/L | 4/6 | SYR4 | 2014–2019 |
| Monobromoacetic Acid | 20.06 µg/L No EPA limit set
worst single sample: 23 µg/L | 4/57 | SYR4 | 2012–2019 |
| Chromium | 2.856 µg/L 2.9% of the EPA limit 100 µg/L
worst single sample: 3.1 µg/L | 3/7 | SYR4 | 2013–2019 |
| Bromoform | 9.975 µg/L No EPA limit set
worst single sample: 10.4 µg/L | 2/65 | SYR4 | 2012–2019 |
| Combined Radium (-226 And -228) | 1.5 pCi/L 30% of the EPA limit 5 pCi/L | 1/1 | SYR4 | 2016 |
| Di(2-ethylhexyl) Phthalate | 1.5 µg/L 25% of the EPA limit 6 µg/L | 1/11 | SYR4 | 2012–2019 |
| Picloram | 0.1130 µg/L 0% of the EPA limit 500 µg/L | 1/3 | SYR4 | 2013–2019 |
| Xylenes, Total | 1.04 µg/L 0% of the EPA limit 10000 µg/L | 1/8 | SYR4 | 2012–2019 |
79 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneCombined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDinosebEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitriteOxamylPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPfmbaPfmpaPFNAPFOAPfpesPftaPftrdaPfunaPentachlorophenolSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene
Utility contact
Frequently asked questions about South Tawakoni Wsc
Is South Tawakoni Wsc tap water safe to drink?
EPA monitoring detected 29 contaminants in South Tawakoni Wsc's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in South Tawakoni Wsc's water?
EPA monitoring detected Bromodichloromethane, Copper, Chloroform, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.
How many people does South Tawakoni Wsc serve?
South Tawakoni Wsc reports serving 5,205 people in Texas, per its EPA record.
Has South Tawakoni Wsc had any water quality violations?
The EPA has 14 violations on file for South Tawakoni Wsc, of which 10 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.